If you have Avalon 741's, you probably have a bunch of AUC3s that you never used.  I'm looking for a couple as spares, drop me a PM with a *reasonable offer*.  Thanks

I have a fairly new 6 GPU rig.  It's on a Asus Prime Z270-A MB and uses risers.  The GPU's are all EVGA Kingpin 1080 Ti's.

The problem is really rather strange and I'm looking to see what others might suggest as a form of debugging.

I can launch any of the mining software under either windows or Linux and the miner will perform flawlessly.  Even OC it up to 800+ h/s per card on equihash with no issues.

But it's when I go to stop the software that I have a problem.  One of the cards, and it seems to be the same one every time.  Will then lock up the computer with an IRQ pending request.  I can see this under linux as a stuck process called IRQ/XXX-nvidia (the XXX is a 3 digit number).  Once I unplug the card from the riser, that will clear and the system utilization will return to normal.  Same thing happens under windows 10.

Again, this does NOT effect the function when the mining software is running, just after... but any time you stop the software, this will happen and if you don't want to risk some hardware damage by unplugging that card, you have to do a hard reset.

I've done all the obvious stuff.  swapped risers, swapped slots, etc and the problem always follows the card.  As an aside I have noticed that this card is always the lowest of the batch of 6 from a h/s standpoint.

Once I remove this card from the system, I never see this issue on 5 cards.

Any thoughts on what I should try before I attempt to get warranty replacement from EVGA?

Thanks in advance,